Mindhunters 2004

Seven FBI agents must undergo a rigorous test to become serial killer hunters. If they succeed, they will be assigned critical missions of high importance. Agent Harris, an unconventional individual, is responsible for training the group. He takes them to a remote island and leaves them to fend for themselves. The agents soon realize that the outcome of this test will reveal that one of them is a serial killer. However, they soon discover during their investigation that one of their own team members has been murdered, and this is no test - one of their team members is a real killer.